Binary compositions of 2,3,3,3-tetrafluoropropene and of ammonia

a technology of tetrafluoropropene and ammonia, which is applied in the field of binary compositions of 2, 3, 3, 3tetrafluoropropene, can solve the problems of high compressor outlet temperature, limited permitted total charge, and damage to the ozone layer of chlorinated compounds

Inactive Publication Date: 2015-05-12
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0034]The present invention makes it possible to meet the requirements felt in the prior art. More particularly, it provides novel compositions with low GWP that are capable of being used (inter alia) as heat transfer fluids, in particular as a replacement for customary heat transfer fluids.
[0037]In certain embodiments, the compositions according to the invention exhibit, in particular, an improved volumetric capacity and / or an improved performance coefficient compared to the compositions from the prior art.
[0038]Finally, the invention makes it possible to partially or completely overcome the problems traditionally associated with ammonia and that are listed above.

Problems solved by technology

In particular, chlorinated compounds (chlorofluorocarbons and hydrochlorofluorocarbons) have the disadvantage of damaging the ozone layer.
However, a certain number of problems are associated with this compound: a very high compressor outlet temperature compared to hydrofluorocarbons; an absence of oil return and the necessity to install an oil separator; a permitted total charge that is sometimes limited due to the toxicity of the product.

Method used

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  • Binary compositions of 2,3,3,3-tetrafluoropropene and of ammonia
  • Binary compositions of 2,3,3,3-tetrafluoropropene and of ammonia
  • Binary compositions of 2,3,3,3-tetrafluoropropene and of ammonia

Examples

Experimental program
Comparison scheme
Effect test

example 1

Azeotropic or Quasi-Azeotropic Compositions

[0096]A vacuum cell equipped with a sapphire tube is cooled to 5° C. with an oil bath. Once thermal equilibrium is reached, the cell is charged with HFO-1234yf, and the pressure at which the equilibrium is achieved is recorded. An amount of NH3 is introduced into the cell, and the content is mixed in order to accelerate equilibration. At equilibrium, a minimal amount of sample is withdrawn from the gas phase and from the liquid phase for gas chromatography analysis with a thermal detector.

[0097]The equilibrium data obtained with various compositions of HFO-1234yf and NH3 are represented in FIG. 1.

example 2

Study of the Performances

[0098]The RK-Soave equation is used for calculating the densities, enthalpies, entropies and liquid / vapour equilibrium data of the mixtures. The use of this equation requires knowledge of the properties of the pure bodies used in the mixtures in question and also the interaction coefficients for each binary mixture.

[0099]The data available for each pure body are the boiling point, the critical temperature and the critical pressure, the curve of pressure as a function of the temperature starting from the boiling point up to the critical point, the saturated liquid and saturated vapour densities as a function of the temperature.

[0100]The data on ammonia are published in the ASHRAE Handbook 2005, chapter 20 and are also available from Refrop (software developed by NIST for calculating the properties of refrigerants).

[0101]The data of the temperature-pressure curve of HFO-1234yf are measured by the static method. The critical temperature and the critical pressur...

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Abstract

A binary composition of 2,3,3,3-tetrafluoropropene and of ammonia, and also to the use thereof, in particular as a heat transfer fluid.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a divisional of U.S. application Ser. No. 13 / 178,955, now U.S. Pat. No. 8,557,135, filed on Jul. 8, 2011, which claims the benefit of French Application No. 11-51077, filed on Feb. 10, 2011. The entire contents of each of U.S. application Ser. No. 13 / 178,955 and French Application No. 11-51077 are hereby incorporated herein by reference in their entirety.FIELD OF THE INVENTION[0002]The present invention relates to binary compositions of 2,3,3,3-tetrafluoropropene, and to the use thereof, in particular as heat transfer fluids.TECHNICAL BACKGROUND[0003]Fluids based on fluorocarbon compounds are widely used in vapour compression heat transfer systems, in particular air conditioning, heat pump, refrigeration or freezing devices. These devices have in common the fact that they are based on a thermodynamic cycle comprising the vaporization of the fluid at low pressure (in which the fluid absorbs heat); the compression...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C09K5/04C08J9/14C09K3/30C11D7/28C11D7/50
CPCC08J9/149C09K3/30C09K5/045C11D7/28C11D7/5018C11D7/5068C09K2205/126C09K2205/132C08J9/127C08J9/146C08J2203/162C08J2203/182C08J2300/22A42B1/002A42B1/041A42C3/02
Inventor RACHED, WISSAMBOUTIER, JEAN-CHRISTOPHE
Owner ARKEMA FRANCE SA
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